4区工程技术

Separations Pub Date : 2026-01-23 DOI: 10.3390/separations13020041

Hequan Zhu, Mustapha Muhammad Nasiru, Sijia Jiang, Yuetao Sun, Dan Liu, Chunyang Li

{"title":"Isolation, Structural Characterization, and In Vitro Antioxidant Activity of Polysaccharides from Cynanchum auriculatum Royle ex Wight","authors":"Hequan Zhu, Mustapha Muhammad Nasiru, Sijia Jiang, Yuetao Sun, Dan Liu, Chunyang Li","doi":"10.3390/separations13020041","DOIUrl":"https://doi.org/10.3390/separations13020041","url":null,"abstract":"A novel polysaccharide from Cynanchum auriculatum Royle ex Wight was isolated, structurally characterized, and its antioxidant activity was evaluated. The crude extract was purified by ion exchange and size exclusion chromatography to obtain a homogeneous fraction, CAP2-1. CAP2-1 displayed a weight-average molecular mass of 184.17 kDa and is mainly composed of galactose, arabinose, and galacturonic acid. Structural analysis revealed that CAP2-1 is a highly branched acidic arabinogalactan-type polysaccharide with a backbone of →6)-β-D-Galp-(1→, →3,6)-β-D-Galp-(1→, and →4)-α-D-GalpA-(1→ units, and side chains enriched in α-L-arabino furanose residues. Ultrasonic degradation produced a lower-molecular-weight derivative, UCAP2-1, which exhibited significantly stronger free radical scavenging ability compared with CAP2-1 (p < 0.01). These findings suggest that molecular weight reduction enhances antioxidant properties by improving electron-donating capacity and accessibility to reactive sites. This study reveals the structure–antioxidant relationship of CAP2-1 and UCAP2-1 and highlights UCAP2-1 as a promising natural antioxidant.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"13 2","pages":"41-41"},"PeriodicalIF":0.0,"publicationDate":"2026-01-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/13/2/41/pdf?version=1769168616","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147381451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization of Ultra-High-Pressure Extraction and Comparative Evaluation of Antioxidant Activity and Flavonoid Composition in Guanxiang Leaves 冠香叶超高压提取工艺优化及抗氧化活性和黄酮类成分比较评价

4区工程技术

Separations Pub Date : 2026-01-01 DOI: 10.3390/separations13010020

Jing Zhang, Jiyao Kang, Haoqian Yan, Y Zhang, Zhenhu Guo, L. P. Liu, GF Zhang, Y Zhang

{"title":"Optimization of Ultra-High-Pressure Extraction and Comparative Evaluation of Antioxidant Activity and Flavonoid Composition in Guanxiang Leaves","authors":"Jing Zhang, Jiyao Kang, Haoqian Yan, Y Zhang, Zhenhu Guo, L. P. Liu, GF Zhang, Y Zhang","doi":"10.3390/separations13010020","DOIUrl":"https://doi.org/10.3390/separations13010020","url":null,"abstract":"This paper aimed to optimize the ultra-high-pressure extraction process of flavonoids from guanxiang leaves, evaluate their antioxidant capacity, and identify the flavonoids. Methods: Guanxiang leaves were used as the raw material. The extraction process was optimized through single-factor experiments and a response surface methodology. Ascorbic acid (Vc) was employed as a positive control, and the in vitro antioxidant activity of flavonoids was assessed by determining the DPPH radical-scavenging rate, ABTS radical-scavenging rate, and FRAP ferric-reducing ability. Results: The optimal extraction conditions were determined as follows: ethanol concentration of 50%, solid-to-liquid ratio of 1:60 (g/mL), extraction pressure of 300 MPa, and pressure-holding time of 3 min. Under these conditions, the yield of guanxiang leaf flavonoids was found to be 2.21%, better than the solvent extraction method (1.94%). The antioxidant test results indicated that the IC50 values of the extract from the ultra-high-pressure treatment of guanxiang leaves were 11.8 and 50.72 μg·mL−1 on DPPH and ABTS scavenging, which were lower than those of the solvent’s extract (13.40 and 54.29 μg·mL−1). Moreover, the antioxidant ability could also be confirmed by Fe3+ ion reduction. Mass spectrometry results indicate that ultra-high-pressure extraction can yield components such as spiraeoside, scutellarin, luteolin, and nepetin, which are not present in solvent extraction methods. Conclusions: Therefore, the ultra-high-pressure extraction method can help to improve the flavonoid yield and antioxidant activity as well as to obtain special product types, including spiraeoside, scutellarin, luteolin, and nepetin, than the solvent extraction method.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"13 1","pages":"20-20"},"PeriodicalIF":0.0,"publicationDate":"2026-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/13/1/20/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147381675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of the Performance and Mechanism of CO2 Capture Using Novel MEA/Polyamine/Sulfolane Biphasic Absorbents 新型MEA/多胺/亚砜双相吸附剂捕集CO2的性能及机理研究

4区工程技术

Separations Pub Date : 2025-12-18 DOI: 10.3390/separations12120342

Guangjie Chen, Guang‐Ying Chen, Li Sze Lai, Zhiwei Zhang, Xiaodi Chen, Yun Hin Taufiq‐Yap

{"title":"Investigation of the Performance and Mechanism of CO2 Capture Using Novel MEA/Polyamine/Sulfolane Biphasic Absorbents","authors":"Guangjie Chen, Guang‐Ying Chen, Li Sze Lai, Zhiwei Zhang, Xiaodi Chen, Yun Hin Taufiq‐Yap","doi":"10.3390/separations12120342","DOIUrl":"https://doi.org/10.3390/separations12120342","url":null,"abstract":"Mixed amine/sulfolane (TMS) biphasic solutions have gained attention for their adjustable structure–activity relationships and lower regeneration energy. In this study, monoethanolamine (MEA) is employed as the main absorbent and polyamine as the co-absorbent, which are subsequently mixed with the phase separation promoter sulfolane (TMS) to form ternary biphasic solvent systems. Polyamine co-absorbents include 3-Dimethylaminopropylamine (DMAPA), 3-Diethylaminopropylamine (DEAPA), and Diethylenetriamine (DETA). Phase separation, absorption, and desorption performances were systematically studied. Reaction and phase separation mechanisms were elucidated through 13C nuclear magnetic resonance (NMR) spectroscopy. The overall mass transfer coefficients (KG) were measured using a wetted wall column (WWC). Variations in the amine-to-sulfolane concentration ratio showed minimal impact on phase volume, while temperature and solvent composition significantly influenced phase separation behavior. All three solvents exhibited superior CO2 capture performance, with CO2 loadings in the rich phases ranging from 4.09 to 4.71 mol/L and over 96.82% of CO2 concentrated in them, cyclic capacities reached or exceeded 3 mol/L, and regeneration energy consumption was 29.63–55.51% lower than 5 M MEA. 13C NMR analysis indicated that multiple N atoms in polyamines promoted the formation of additional ionic species during CO2 absorption, thereby enhancing phase separation completeness. Furthermore, KG values for the ternary systems exceeded that of conventional MEA, with the MEA/DEAPA/TMS system exhibiting a 1.7-fold increase. These findings demonstrated the industrial potential of MEA/polyamine/TMS biphasic solvents for efficient CO2 capture.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 12","pages":"342-342"},"PeriodicalIF":0.0,"publicationDate":"2025-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of Novel γ-Carbon-Substituted Dialkylphosphinic Acids (P355/P227-355): Unraveling Structural Symmetry Effects on Middle Rare Earth Separation and Extraction Mechanism 新型γ-碳取代二烷基膦酸（P355/P227-355）的合成：揭示结构对称性对中稀土分离萃取机理的影响

4区工程技术

Separations Pub Date : 2025-11-01 DOI: 10.3390/separations12110303

Ruiyi Sun, Fan Li, Yu Xie, Na Sui, Yong Li, Junlian Wang

{"title":"Synthesis of Novel γ-Carbon-Substituted Dialkylphosphinic Acids (P355/P227-355): Unraveling Structural Symmetry Effects on Middle Rare Earth Separation and Extraction Mechanism","authors":"Ruiyi Sun, Fan Li, Yu Xie, Na Sui, Yong Li, Junlian Wang","doi":"10.3390/separations12110303","DOIUrl":"https://doi.org/10.3390/separations12110303","url":null,"abstract":"In this study, two γ-carbon-substituted dialkylphosphinic acids—symmetrical di-(3,5,5-trimethylhexyl)phosphinic acid (P355) and unsymmetrical (2-ethylhexyl)(3,5,5-trimethylhexyl)phosphinic acid (P227-355)—were synthesized via a precise free radical addition method. Their chemical structures were fully characterized using ESI-HRMS, 1H NMR, 31P NMR, and FT-IR. Their middle REE extraction/separation performance, anti-emulsification behavior, and underlying mechanisms were investigated. Key results showed that P355 had better Dy saturation capacity (357.51 mg/L) and good selectivity for middle REEs (their average value of βN + 1/N = 3.18), while P227-355 showed higher back-extraction efficiency (≈90% Dy stripping at ≥0.02 mol/L H2SO4). Methyl n-pentyl ketone (MNPK) eliminated emulsification and boosted saturation capacity (324.18 mg/L Sm and 357.51 mg/L Dy for P355). Mechanistically, the extraction followed cation exchange (Sm3+ + 2(HL)2 ↔ Sm·L3·(HL) + 3H+); MNPK formed hydrogen-bonded associates (HL·MNPK) with free extractants, slightly reducing the effective concentration of (HL)2 but not altering the core cation exchange mechanism.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 11","pages":"303-303"},"PeriodicalIF":0.0,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/11/303/pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced Treatment of Swine Farm Wastewater Using an O3/Fe2+/H2O2 Process: Optimization and Performance Evaluation via Response Surface Methodology O3/Fe2+/H2O2强化处理猪场废水：响应面法优化及性能评价

4区工程技术

Separations Pub Date : 2025-10-10 DOI: 10.3390/separations12100277

Hang Yu, Kexin Tang, Jingqi Li, Linxi Dong, Zuo Tong How, Dongming Wu, Rui Qin

{"title":"Enhanced Treatment of Swine Farm Wastewater Using an O3/Fe2+/H2O2 Process: Optimization and Performance Evaluation via Response Surface Methodology","authors":"Hang Yu, Kexin Tang, Jingqi Li, Linxi Dong, Zuo Tong How, Dongming Wu, Rui Qin","doi":"10.3390/separations12100277","DOIUrl":"https://doi.org/10.3390/separations12100277","url":null,"abstract":"Biologically treated swine farm wastewater still contains high levels of refractory organics, humic substances and antibiotic residues, posing environmental risks and limiting opportunities for water reuse. Wastewater treatment by ozonation alone suffers from low mass transfer efficiency and selective oxidation. To overcome these limitations, a catalytic ozonation process (O3/Fe2+/H2O2) was applied and optimized using Response Surface Methodology (RSM) based on single-factor experiments and Central Composite Design (CCD) for advanced swine farm wastewater treatment. The optimal conditions ([O3] = 25.0 mg/L, [Fe2+] = 25.9 mg/L, [H2O2] = 41.1 mg/L) achieved a COD removal of 44.3%, which was 86.8% higher than that of ozonation alone, and increased TOC removal to 29.5%, indicating effective mineralization. Biodegradability (BOD5/COD) of swine farm wastewater effluent increased from 0.01 to 0.34 after the catalytic ozonation treatment. Humic-like and fulvic-like substances were removed by 93.7% and 95.4%, respectively, and antibiotic degradation was significantly accelerated and enhanced. The synergistic process improved ozone utilization efficiency by 33.1% and removed 53.95% of total phosphorus through Fe3+-mediated coprecipitation. These findings demonstrate that with catalytic ozone decomposition and production of hydroxyl radicals, the O3/Fe2+/H2O2 system effectively integrates enhanced ozone utilization efficiency, radical synergy, and simultaneous pollutant removal, providing a cost-effective and technically feasible strategy for advanced swine farm wastewater treatment and safe reuse.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 10","pages":"277-277"},"PeriodicalIF":0.0,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/10/277/pdf?version=1760089830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Adsorption of Cr(III) by IRA-900 Resin in Sodium Phosphite and Sulfuric Acid System IRA-900树脂在亚磷酸钠-硫酸体系中对Cr（III）的吸附

4区工程技术

Separations Pub Date : 2025-10-05 DOI: 10.3390/separations12100270

Tingjie Xu, D. P. C. GAN, Guowang Wei, Yingjie Yang, Qiankun Wei, Chunlin He

{"title":"Adsorption of Cr(III) by IRA-900 Resin in Sodium Phosphite and Sulfuric Acid System","authors":"Tingjie Xu, D. P. C. GAN, Guowang Wei, Yingjie Yang, Qiankun Wei, Chunlin He","doi":"10.3390/separations12100270","DOIUrl":"https://doi.org/10.3390/separations12100270","url":null,"abstract":"Chromium (Cr), a toxic heavy metal, poses significant environmental and health risks when industrial effluents containing Cr are discharged untreated. Addressing this challenge, this study developed a selective chromium removal strategy using IRA-900 resin in a sulfuric acid system with sodium phosphite (NaH2PO3) as a complexing agent. In the NaH2PO3-H2SO4 system, IRA-900 resin exhibited exceptional selectivity for Cr3+ with minimal co-adsorption of competing ions. The adsorption process followed the Langmuir isotherm model (R2 > 0.99), indicating monolayer chemisorption dominated by homogeneous active sites, and achieved a maximum capacity of 103.56 mg·g−1. Characterization via XPS, FT-IR, and SEM-EDS revealed a two-step mechanism: Cr3+ reacts with H2PO3− to form an anionic complex, and then the complex undergoes electrostatic interaction and ion exchange with chloride ions (Cl−) on the quaternary ammonium groups of the resin. The chromium-loaded resin demonstrated remarkable structural stability, resisting Cr3+ desorption under conventional elution conditions. This property provides a novel pathway for chromium solidification in industrial wastewater, effectively minimizing secondary pollution risks. This work advances the design of ligand-assisted ion-exchange systems for targeted heavy metal removal, offering both high selectivity and environmental compatibility in wastewater treatment.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 10","pages":"270-270"},"PeriodicalIF":0.0,"publicationDate":"2025-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/10/270/pdf?version=1759658414","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147332672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Porous Imprinted Microspheres with Covalent Organic Framework-Based, Precisely Designed Sites for the Specific Adsorption of Flavonoids 基于共价有机框架的多孔印迹微球，精确设计的黄酮类化合物特异性吸附位点

4区工程技术

Separations Pub Date : 2025-10-01 DOI: 10.3390/separations12100267

Jinyu Li, Xuan Zhang, Jincheng Xu, Xi Feng, Shucheng Liu

{"title":"Porous Imprinted Microspheres with Covalent Organic Framework-Based, Precisely Designed Sites for the Specific Adsorption of Flavonoids","authors":"Jinyu Li, Xuan Zhang, Jincheng Xu, Xi Feng, Shucheng Liu","doi":"10.3390/separations12100267","DOIUrl":"https://doi.org/10.3390/separations12100267","url":null,"abstract":"The application of microsphere molecularly imprinted materials for the targeted extraction and purification of flavonoids derived from agricultural waste has emerged as a prominent area of investigation. An innovative boronate affinity imprinted microsphere (MC-CD@BA-MIP) was successfully synthesized using the Pickering emulsion interfacial assembly strategy for the selective separation of naringin (NRG). The double-bond functionalized covalent organic framework (COF)-based microspheres were synthesized through Schiff–base reaction and secondary interfacial emulsion polymerization. Then, the synthetic mono-(6-mercapto-6-deoxy)-β-cyclodextrin (SH-β-CD) was grafted onto the surface of the microspheres (MC) using click chemistry. The 1-allylpyridine-3-boronic acid (APBA) as a functional monomer was grafted onto the initiator (ABIB) through atom transfer radical polymerization (ATRP). Ultimately, the synthesized boronic acid-imprinted ABIB-BA-MIPs were immobilized onto the COFs microsphere surface through host–guest interactions. As expected, under neutral conditions, the MC-CD@BA-MIPs still exhibited a significant adsorption capacity (38.78 μmol g−1 at 308 K) for NRG. The regenerated MC-CD@BA-MIPs maintained 92.56% of their initial adsorption capacity through six consecutive cycles.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 10","pages":"267-267"},"PeriodicalIF":0.0,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Efficient Photocatalytic Reduction of Cr(VI) on N-Doped Sludge/Cellulose-Derived Porous Carbon Using Synergistic Experimental–Deep Learning Approach 利用协同实验-深度学习方法在n掺杂污泥/纤维素衍生多孔碳上高效光催化还原Cr（VI）

4区工程技术

Separations Pub Date : 2025-09-09 DOI: 10.3390/separations12090247

Na Huang, Shengwen Chen, Wei Du

{"title":"Efficient Photocatalytic Reduction of Cr(VI) on N-Doped Sludge/Cellulose-Derived Porous Carbon Using Synergistic Experimental–Deep Learning Approach","authors":"Na Huang, Shengwen Chen, Wei Du","doi":"10.3390/separations12090247","DOIUrl":"https://doi.org/10.3390/separations12090247","url":null,"abstract":"The photocatalytic reduction of hexavalent chromium (Cr(VI)) in wastewater represents a critical environmental challenge, given its high toxicity and mobility in wastewater. Conventional optimization methods relying on repetitive batch experiments with excessive reagent consumption. Herein, we proposed a synergistic experimental–deep learning approach to realize efficient photocatalytic reduction of Cr(VI). Sludge and cellulose precursors were used to prepare N-doped porous carbon through a green fabrication method at low temperature. After optimizing the composition and experimental factors, the removal efficiency of Cr(VI) could reach 92.7% after visible light irradiation in an acidic environment. The high efficiency originated from the coupled adsorption and photocatalytic mechanism. Innovatively, after comparing three algorithms, TCN and Transformer were employed to predict the desirable removal efficiency with <5% prediction error under different reaction conditions. This work highlights the novel experimental–deep learning method for heavy metal remediation using N-doped waste-derived porous carbon.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 9","pages":"247-247"},"PeriodicalIF":0.0,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/9/247/pdf?version=1757423412","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study on the Performance of BiOCl Photocatalyst for Degradation of Tetracycline Hydrochloride 生物光催化剂降解盐酸四环素的性能研究

4区工程技术

Separations Pub Date : 2025-09-05 DOI: 10.3390/separations12090242

Fang Li, Y.S. Cheng, Peiyuan Li, Guanlong Yu

{"title":"Study on the Performance of BiOCl Photocatalyst for Degradation of Tetracycline Hydrochloride","authors":"Fang Li, Y.S. Cheng, Peiyuan Li, Guanlong Yu","doi":"10.3390/separations12090242","DOIUrl":"https://doi.org/10.3390/separations12090242","url":null,"abstract":"Tetracycline hydrochloride (TC-HCl) is widely used in the prevention and treatment of human/animal bacterial infection due to its good antibacterial activity. However, because of its high hydrophilicity and low volatility, TC-HCl can enter the natural water body through various ways and exist in it statically for a long time, which then causes environmental toxicity and even threatens human health. Photocatalysis, which can use free, clean and sustainable solar energy to provide power, achieves the conversion of solar energy to chemical energy and is a promising green technology for solving global environmental and energy challenges. BiOCl has suitable valence/conduction potential and good stability and hierarchical structure, which contributes to smooth transfer of surface charge. BiOCl photocatalyst materials with deionized water, anhydrous ethanol (EtOH), and ethylene glycol (EG) as solvents were prepared by using different viscosity solutions as reaction media. The characterization results showed that the type of solvent is what mainly affected the morphology and absorption intensity of the photocatalyst. BiOCl prepared with EG as solvent has the best photocatalytic degradation performance of TC-HCl, and the removal rate can reach 76% after 60 min of visible light irradiation. Its strong light response intensity and unique spherical structure contribute to the enhancement of photocatalytic activity.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 9","pages":"242-242"},"PeriodicalIF":0.0,"publicationDate":"2025-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/9/242/pdf?version=1757071642","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147333602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Highly Efficient Extraction of Phenolic Compounds from Coal Tar Using Alcohol Amine Aqueous Solutions via Synergistic Extraction 醇胺协同萃取高效提取煤焦油中酚类化合物

4区工程技术

Separations Pub Date : 2025-08-25 DOI: 10.3390/separations12090227

Yonglin Li, Bing Peng, Y. Yang, Qiuhong Ai, Jiayi Zhou, Yong Wang, Huajie Liu, Weiwei Yan

{"title":"Highly Efficient Extraction of Phenolic Compounds from Coal Tar Using Alcohol Amine Aqueous Solutions via Synergistic Extraction","authors":"Yonglin Li, Bing Peng, Y. Yang, Qiuhong Ai, Jiayi Zhou, Yong Wang, Huajie Liu, Weiwei Yan","doi":"10.3390/separations12090227","DOIUrl":"https://doi.org/10.3390/separations12090227","url":null,"abstract":"This study utilizes aqueous solutions of organic amines as extractants to remove phenolic compounds from coal tar. It elucidates the extraction mechanism between phenolic compounds and organic amines, and conducts a comprehensive investigation into the extraction performance of various monomeric organic amine aqueous solutions and their composite solutions for phenolic compounds in model oils or light coal tar. The experimental results showed that monoethanolamine (MEA), characterized by a higher reaction equilibrium constant, exhibits superior extraction performance for phenolic compounds in light coal tar compared to diethanolamine (DEA), triethanolamine (TEA), methyldiethanolamine (MDEA), and diethylaminoethanol (DEAE) when used at the same mass concentration of extractant. The addition of a specific concentration of DEA or TEA to a 20 wt%–25 wt% MEA solution significantly reduces the entrainment of neutral oil impurities during the extraction process and enhances the precipitation of phenolic compounds during the acidification phase. Under the optimal process parameters, the composite aqueous solution, comprising 25 wt% MEA, 5 wt% DEA, and 5 wt% TEA, demonstrated a 35.1 wt% increase in the acidification yield of phenolic compounds, Ya,P, a 20.8 wt% increase in the total yield of phenolic compounds, YP, and a 46.0% significant decrease in neutral oil entrainment compared to the solution with a 30% MEA aqueous solution.","PeriodicalId":21833,"journal":{"name":"Separations","volume":"12 9","pages":"227-227"},"PeriodicalIF":0.0,"publicationDate":"2025-08-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2297-8739/12/9/227/pdf?version=1756198411","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147330682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Separations最新文献